|
|
A017127
|
|
a(n) = (8*n + 5)^3.
|
|
1
|
|
|
125, 2197, 9261, 24389, 50653, 91125, 148877, 226981, 328509, 456533, 614125, 804357, 1030301, 1295029, 1601613, 1953125, 2352637, 2803221, 3307949, 3869893, 4492125, 5177717, 5929741, 6751269
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4); a(0)=125, a(1)=2197, a(2)=9261, a(3)=24389. - Harvey P. Dale, May 09 2013
G.f.: ( 125 + 1697*x + 1223*x^2 + 27*x^3 ) / ( (x-1)^4 ). - R. J. Mathar, May 08 2015
|
|
MATHEMATICA
|
(8*Range[0, 30]+5)^3 (* or *) LinearRecurrence[{4, -6, 4, -1}, {125, 2197, 9261, 24389}, 30] (* Harvey P. Dale, May 09 2013 *)
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|